Collapsible bottom storage box



FIG. 1 is a front perspective view of a collapsible bottom storage box showing my ornamental design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view thereof, shown with the collapsible bottom storage box in an open configuration;

FIG. 4 is a rear perspective view thereof, shown with the collapsible bottom storage box in an open configuration;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a top view thereof; and,

FIG. 10 is a bottom view thereof.

The broken lines are included for the purpose of illustrating portions of the collapsible bottom storage box and form no part of the claimed design. 

CLAIM The ornamental design for a collapsible bottom storage box, as shown and described. 